& cplSiteName &
Comments
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
<<   <   Page 2 / 4   >   >>
Tony Li
Tony Li
12/5/2012 | 1:43:44 AM
re: Cisco Unveils the HFR

Durty,

The double counting was actually started by Wellfleet. When confronted with this, Cisco conciously chose to follow, and started double counting packets and bandwidth. They could have chosen to lead the industry and fight the malarky, but instead chose to become complicit in the duplicity.

Tony
H_ngm_N
H_ngm_N
12/5/2012 | 1:43:43 AM
re: Cisco Unveils the HFR
Cisco will maintain that the 8port 10gig card doesn't pose a serious problem because the card will be able to forward frames between all ports on the same card at line rate.

The 40gig 'slot' is a backplane connection speed, not an aggregate card speed.

That's my take on it anyways.

= K
Light-bulb
Light-bulb
12/5/2012 | 1:43:43 AM
re: Cisco Unveils the HFR
Not sure why Bush Sucks? But hey... each to our own.
Anyway, I have "heard" that Fujitsu 7300 supports OC-768.
As to Nortel, I had also "heard" that they have working 768, but perhaps its not commercially available...
So how are they going to connect it... a port with a little cable connected to a transponder, muxd up and sent down the line... to be demuxd to a transponder to the little cable connected to the port... and gargle and repeat backwards. DT has had several trials with 768 as well.

Also... can anyone else back up that Ciena is trying to get out of the DWDM business? First-hand facts would be great.
TriteReading
TriteReading
12/5/2012 | 1:43:43 AM
re: Cisco Unveils the HFR
It will be hard to prove that it is indeed OC768c at 40Gb/s line rate without an independent test tool that can prove it.
Light-bulb
Light-bulb
12/5/2012 | 1:43:42 AM
re: Cisco Unveils the HFR
Hopefully my last reply honestly...
TriteReading,

Actually its VERY easy to test an aggregate link.
CFS-1a connects to CRS-1b via 40gb link

CFS-1a has 4 OC-192 POS cards each port connected to testing platform

CFS-1b has 4 OC-192 POS cards each port connected to testing platform

Run line rate test concurrently record results.

Just one method, and don't forget to pay the penalty for overhead.

Cheers,
Alpine
Alpine
12/5/2012 | 1:43:40 AM
re: Cisco Unveils the HFR
I wonder what this means for Procket. They seem noticable quiet and no one is mentioning them as
durtyphiber
durtyphiber
12/5/2012 | 1:43:39 AM
re: Cisco Unveils the HFR
Hmmm....Wellfleet is just a bit before my time, and regardless, Wellfleet or Cabletron, the point is the same.

With respect to the decision that Cisco made, it could have fought it. However, that would have cost money in both the marketing and lost sales from the customers who didn't "get it".

The reality of the situation is that everyone in the industry knows that it's a 'double count', which means they half them automatically. I would not go so far as to call it duplicity, as no one is really being duped. :) It's more of a running joke.

-dp
TriteReading
TriteReading
12/5/2012 | 1:43:39 AM
re: Cisco Unveils the HFR
It is not a true independent verification if you are using the same company's hardware to test itself. I was thinking of something more like and Ixia or Agilent box.
durtyphiber
durtyphiber
12/5/2012 | 1:43:37 AM
re: Cisco Unveils the HFR
Exactly....after all....IOS will use CDP, the Conspiracy Distribution Protocol to get all of the routers to conspire together and give you bogus stats. Really....that 2501 can do 50Mpps!

-dp
Light-bulb
Light-bulb
12/5/2012 | 1:43:36 AM
re: Cisco Unveils the HFR
Hmm, perhaps I didn't explain well enough from my last post.

The 10Gbit/s Ethernet interfaces would be connected to a IXIA, SMARTBITS, Agilent, Exfo, Digital Lightwave, name your poison. Thus you'd have a total of 8 test sets, for end-to-end testing. Each running line-rate across the 10GigE module through the 40G link back to a 10GigE module to the Test set.

Would that not be independent?

I do have a slight fear of the OC-768 card though. Call it gun shy... the 192 for the cerent caused some issues with heat and power, (And backplane redesign) I wonder what the dissipation is for the 768 card, its a remarkable card truly. Single Slot 768, that is impressive guys. Yes I know they aren't the underdog, but seriously its an engineering feat that will be applauded, and should be applauded.

Now... Where's the Beef?
<<   <   Page 2 / 4   >   >>


Featured Video
Upcoming Live Events
November 14, 2019, Maritim Hotel, Berlin
December 3-5, 2019, Vienna, Austria
December 3, 2019, New York, New York
March 16-18, 2020, Embassy Suites, Denver, Colorado
May 18-20, 2020, Irving Convention Center, Dallas, TX
All Upcoming Live Events